Flower & Snake: Zero

The wealthy president of a company has built up an unpayable debt to a local crime lord, and to escape punishment he sells his famous dancer wife to the lecherous old man figuring a 90 year old can’t do too much bad with her. Perhaps not, but others can while he watches. She’s put on stage in an underground BDSM sex show and begins a spiraling decent from strongly independent woman to submissive sex slave

The beautiful Shizuko and her husband Toyama Takayoshi have a loving relationship, But Takayoshi is getting older and isn't always able to perform. His primary source of gratification involves observing his wife in sadomasochistic scenarios so he commissions a painter, skilled in the arts of bondage to bring these fantasies to life. Soon, Shiziko becomes a willing and submissive participant in fulfilling the S&M fantasies of not only her husband but a slew of rich lecherous men.

A businessman is ruthless with his competitors, and in response his competitors after being driven out of business kidnap aforementioned business man's wife and start training her to be a porn star, particularly of the S&M/bondage variety

Misaki Amemiya is an assistant inspector for the Metropolitan Police Department's Community Safety Bureau who becomes ensnared in a trap while investigating a mysterious illegal video website called "Babylon". Soon, she's bound and tortured along with Shizuko and an oversexed housewife named Ruri.